Story based custom NPCs are usually less common form of player created NPC. While they may service a kink or specific fetish like a Kink based NPC, they generally have a much more fleshed out back story that their creator may add to as more time becomes available.
Non exhaustive list of current NPCs in the Story based category. To download, open Bonfire's main menu and go to Mods -> NPC Manger, and click "Refresh." Find the NPC's name and click "Download."
|Grummush||Leothelion||Keeping human pets for sex|
|Kayden||Leothelion||Big cocks, cum drinking/feeding, muscular orc men|
|Mazrad||Leothelion||Harvesting sexual energy from male mortals|
|Mokhresh||Leothelion||Sex with humans, breeding|
|Mokhthar||Leothelion||Small penis humiliation|
|Romar||Leothelion||Rough sex, domination, cum facial, breeding|
|Xerxes||Buoysel||Muscle growth, possession, fusion|
|Xhor||Buoysel||Muscle Growth, Musk, Group Growth|